src/msw/graphics.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/graphics.cpp
   3 // Purpose:     wxGCDC class
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     2006-09-30
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2006 Stefan Csomor
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #include "wx/wxprec.h"
  13
  14 #ifdef __BORLANDC__
  15     #pragma hdrstop
  16 #endif
  17
  18 #include "wx/dc.h"
  19
  20 #if wxUSE_GRAPHICS_CONTEXT
  21
  22 #ifndef WX_PRECOMP
  23     #include "wx/msw/wrapcdlg.h"
  24     #include "wx/image.h"
  25     #include "wx/window.h"
  26     #include "wx/utils.h"
  27     #include "wx/dialog.h"
  28     #include "wx/app.h"
  29     #include "wx/bitmap.h"
  30     #include "wx/log.h"
  31     #include "wx/icon.h"
  32     #include "wx/module.h"
  33     // include all dc types that are used as a param
  34     #include "wx/dc.h"
  35     #include "wx/dcclient.h"
  36     #include "wx/dcmemory.h"
  37     #include "wx/dcprint.h"
  38 #endif
  39
  40 #include "wx/stack.h"
  41
  42 #include "wx/private/graphics.h"
  43 #include "wx/msw/wrapgdip.h"
  44 #include "wx/msw/dc.h"
  45 #if wxUSE_ENH_METAFILE
  46     #include "wx/msw/enhmeta.h"
  47 #endif
  48 #include "wx/dcgraph.h"
  49
  50 #include "wx/msw/private.h" // needs to be before #include <commdlg.h>
  51
  52 #if wxUSE_COMMON_DIALOGS && !defined(__WXMICROWIN__)
  53 #include <commdlg.h>
  54 #endif
  55
  56 namespace
  57 {
  58
  59 //-----------------------------------------------------------------------------
  60 // constants
  61 //-----------------------------------------------------------------------------
  62
  63 const double RAD2DEG = 180.0 / M_PI;
  64
  65 //-----------------------------------------------------------------------------
  66 // Local functions
  67 //-----------------------------------------------------------------------------
  68
  69 inline double dmin(double a, double b) { return a < b ? a : b; }
  70 inline double dmax(double a, double b) { return a > b ? a : b; }
  71
  72 inline double DegToRad(double deg) { return (deg * M_PI) / 180.0; }
  73 inline double RadToDeg(double deg) { return (deg * 180.0) / M_PI; }
  74
  75 // translate a wxColour to a Color
  76 inline Color wxColourToColor(const wxColour& col)
  77 {
  78     return Color(col.Alpha(), col.Red(), col.Green(), col.Blue());
  79 }
  80
  81 } // anonymous namespace
  82
  83 //-----------------------------------------------------------------------------
  84 // device context implementation
  85 //
  86 // more and more of the dc functionality should be implemented by calling
  87 // the appropricate wxGDIPlusContext, but we will have to do that step by step
  88 // also coordinate conversions should be moved to native matrix ops
  89 //-----------------------------------------------------------------------------
  90
  91 // we always stock two context states, one at entry, to be able to preserve the
  92 // state we were called with, the other one after changing to HI Graphics orientation
  93 // (this one is used for getting back clippings etc)
  94
  95 //-----------------------------------------------------------------------------
  96 // wxGraphicsPath implementation
  97 //-----------------------------------------------------------------------------
  98
  99 class wxGDIPlusContext;
 100
 101 class wxGDIPlusPathData : public wxGraphicsPathData
 102 {
 103 public :
 104     wxGDIPlusPathData(wxGraphicsRenderer* renderer, GraphicsPath* path = NULL);
 105     ~wxGDIPlusPathData();
 106
 107     virtual wxGraphicsObjectRefData *Clone() const;
 108
 109     //
 110     // These are the path primitives from which everything else can be constructed
 111     //
 112
 113     // begins a new subpath at (x,y)
 114     virtual void MoveToPoint( wxDouble x, wxDouble y );
 115
 116     // adds a straight line from the current point to (x,y)
 117     virtual void AddLineToPoint( wxDouble x, wxDouble y );
 118
 119     // adds a cubic Bezier curve from the current point, using two control points and an end point
 120     virtual void AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y );
 121
 122
 123     // adds an arc of a circle centering at (x,y) with radius (r) from startAngle to endAngle
 124     virtual void AddArc( wxDouble x, wxDouble y, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise ) ;
 125
 126     // gets the last point of the current path, (0,0) if not yet set
 127     virtual void GetCurrentPoint( wxDouble* x, wxDouble* y) const;
 128
 129     // adds another path
 130     virtual void AddPath( const wxGraphicsPathData* path );
 131
 132     // closes the current sub-path
 133     virtual void CloseSubpath();
 134
 135     //
 136     // These are convenience functions which - if not available natively will be assembled
 137     // using the primitives from above
 138     //
 139
 140     // appends a rectangle as a new closed subpath
 141     virtual void AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h ) ;
 142     /*
 143
 144     // appends an ellipsis as a new closed subpath fitting the passed rectangle
 145     virtual void AddEllipsis( wxDouble x, wxDouble y, wxDouble w , wxDouble h ) ;
 146
 147     // draws a an arc to two tangents connecting (current) to (x1,y1) and (x1,y1) to (x2,y2), also a straight line from (current) to (x1,y1)
 148     virtual void AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r )  ;
 149 */
 150
 151     // returns the native path
 152     virtual void * GetNativePath() const { return m_path; }
 153
 154     // give the native path returned by GetNativePath() back (there might be some deallocations necessary)
 155     virtual void UnGetNativePath(void * WXUNUSED(path)) const {}
 156
 157     // transforms each point of this path by the matrix
 158     virtual void Transform( const wxGraphicsMatrixData* matrix ) ;
 159
 160     // gets the bounding box enclosing all points (possibly including control points)
 161     virtual void GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const;
 162
 163     virtual bool Contains( wxDouble x, wxDouble y, wxPolygonFillMode fillStyle = wxODDEVEN_RULE) const;
 164
 165 private :
 166     GraphicsPath* m_path;
 167 };
 168
 169 class wxGDIPlusMatrixData : public wxGraphicsMatrixData
 170 {
 171 public :
 172     wxGDIPlusMatrixData(wxGraphicsRenderer* renderer, Matrix* matrix = NULL) ;
 173     virtual ~wxGDIPlusMatrixData() ;
 174
 175     virtual wxGraphicsObjectRefData* Clone() const ;
 176
 177     // concatenates the matrix
 178     virtual void Concat( const wxGraphicsMatrixData *t );
 179
 180     // sets the matrix to the respective values
 181     virtual void Set(wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
 182         wxDouble tx=0.0, wxDouble ty=0.0);
 183
 184     // gets the component valuess of the matrix
 185     virtual void Get(wxDouble* a=NULL, wxDouble* b=NULL,  wxDouble* c=NULL,
 186                      wxDouble* d=NULL, wxDouble* tx=NULL, wxDouble* ty=NULL) const;
 187
 188     // makes this the inverse matrix
 189     virtual void Invert();
 190
 191     // returns true if the elements of the transformation matrix are equal ?
 192     virtual bool IsEqual( const wxGraphicsMatrixData* t) const ;
 193
 194     // return true if this is the identity matrix
 195     virtual bool IsIdentity() const;
 196
 197     //
 198     // transformation
 199     //
 200
 201     // add the translation to this matrix
 202     virtual void Translate( wxDouble dx , wxDouble dy );
 203
 204     // add the scale to this matrix
 205     virtual void Scale( wxDouble xScale , wxDouble yScale );
 206
 207     // add the rotation to this matrix (radians)
 208     virtual void Rotate( wxDouble angle );
 209
 210     //
 211     // apply the transforms
 212     //
 213
 214     // applies that matrix to the point
 215     virtual void TransformPoint( wxDouble *x, wxDouble *y ) const;
 216
 217     // applies the matrix except for translations
 218     virtual void TransformDistance( wxDouble *dx, wxDouble *dy ) const;
 219
 220     // returns the native representation
 221     virtual void * GetNativeMatrix() const;
 222 private:
 223     Matrix* m_matrix ;
 224 } ;
 225
 226 class wxGDIPlusPenData : public wxGraphicsObjectRefData
 227 {
 228 public:
 229     wxGDIPlusPenData( wxGraphicsRenderer* renderer, const wxPen &pen );
 230     ~wxGDIPlusPenData();
 231
 232     void Init();
 233
 234     virtual wxDouble GetWidth() { return m_width; }
 235     virtual Pen* GetGDIPlusPen() { return m_pen; }
 236
 237 protected :
 238     Pen* m_pen;
 239     Image* m_penImage;
 240     Brush* m_penBrush;
 241
 242     wxDouble m_width;
 243 };
 244
 245 class wxGDIPlusBrushData : public wxGraphicsObjectRefData
 246 {
 247 public:
 248     wxGDIPlusBrushData( wxGraphicsRenderer* renderer );
 249     wxGDIPlusBrushData( wxGraphicsRenderer* renderer, const wxBrush &brush );
 250     ~wxGDIPlusBrushData ();
 251
 252     void CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
 253                                    wxDouble x2, wxDouble y2,
 254                                    const wxGraphicsGradientStops& stops);
 255     void CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
 256                                    wxDouble xc, wxDouble yc,
 257                                    wxDouble radius,
 258                                    const wxGraphicsGradientStops& stops);
 259
 260     virtual Brush* GetGDIPlusBrush() { return m_brush; }
 261
 262 protected:
 263     virtual void Init();
 264
 265 private:
 266     // common part of Create{Linear,Radial}GradientBrush()
 267     template <typename T>
 268     void SetGradientStops(T *brush, const wxGraphicsGradientStops& stops);
 269
 270     Brush* m_brush;
 271     Image* m_brushImage;
 272     GraphicsPath* m_brushPath;
 273 };
 274
 275 class WXDLLIMPEXP_CORE wxGDIPlusBitmapData : public wxGraphicsObjectRefData
 276 {
 277 public:
 278     wxGDIPlusBitmapData( wxGraphicsRenderer* renderer, Bitmap* bitmap );
 279     wxGDIPlusBitmapData( wxGraphicsRenderer* renderer, const wxBitmap &bmp );
 280     ~wxGDIPlusBitmapData ();
 281
 282     virtual Bitmap* GetGDIPlusBitmap() { return m_bitmap; }
 283
 284 #if wxUSE_IMAGE
 285     wxImage ConvertToImage() const;
 286 #endif // wxUSE_IMAGE
 287
 288 private :
 289     Bitmap* m_bitmap;
 290     Bitmap* m_helper;
 291 };
 292
 293 class wxGDIPlusFontData : public wxGraphicsObjectRefData
 294 {
 295 public:
 296     wxGDIPlusFontData( wxGraphicsRenderer* renderer,
 297                        const wxFont &font,
 298                        const wxColour& col );
 299     wxGDIPlusFontData(wxGraphicsRenderer* renderer,
 300                       const wxString& name,
 301                       REAL sizeInPixels,
 302                       int style,
 303                       const wxColour& col);
 304     ~wxGDIPlusFontData();
 305
 306     virtual Brush* GetGDIPlusBrush() { return m_textBrush; }
 307     virtual Font* GetGDIPlusFont() { return m_font; }
 308
 309 private :
 310     // Common part of all ctors, flags here is a combination of values of
 311     // FontStyle GDI+ enum.
 312     void Init(const wxString& name,
 313               REAL size,
 314               int style,
 315               const wxColour& col,
 316               Unit fontUnit);
 317
 318     Brush* m_textBrush;
 319     Font* m_font;
 320 };
 321
 322 class wxGDIPlusContext : public wxGraphicsContext
 323 {
 324 public:
 325     wxGDIPlusContext( wxGraphicsRenderer* renderer, const wxDC& dc );
 326     wxGDIPlusContext( wxGraphicsRenderer* renderer, HDC hdc, wxDouble width, wxDouble height );
 327     wxGDIPlusContext( wxGraphicsRenderer* renderer, HWND hwnd );
 328     wxGDIPlusContext( wxGraphicsRenderer* renderer, Graphics* gr);
 329     wxGDIPlusContext(wxGraphicsRenderer* renderer);
 330
 331     virtual ~wxGDIPlusContext();
 332
 333     virtual void Clip( const wxRegion &region );
 334     // clips drawings to the rect
 335     virtual void Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 336
 337     // resets the clipping to original extent
 338     virtual void ResetClip();
 339
 340     virtual void * GetNativeContext();
 341
 342     virtual void StrokePath( const wxGraphicsPath& p );
 343     virtual void FillPath( const wxGraphicsPath& p , wxPolygonFillMode fillStyle = wxODDEVEN_RULE );
 344
 345     virtual void DrawRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 346
 347     // stroke lines connecting each of the points
 348     virtual void StrokeLines( size_t n, const wxPoint2DDouble *points);
 349
 350     // draws a polygon
 351     virtual void DrawLines( size_t n, const wxPoint2DDouble *points, wxPolygonFillMode fillStyle = wxODDEVEN_RULE );
 352
 353     virtual bool SetAntialiasMode(wxAntialiasMode antialias);
 354
 355     virtual bool SetInterpolationQuality(wxInterpolationQuality interpolation);
 356
 357     virtual bool SetCompositionMode(wxCompositionMode op);
 358
 359     virtual void BeginLayer(wxDouble opacity);
 360
 361     virtual void EndLayer();
 362
 363     virtual void Translate( wxDouble dx , wxDouble dy );
 364     virtual void Scale( wxDouble xScale , wxDouble yScale );
 365     virtual void Rotate( wxDouble angle );
 366
 367     // concatenates this transform with the current transform of this context
 368     virtual void ConcatTransform( const wxGraphicsMatrix& matrix );
 369
 370     // sets the transform of this context
 371     virtual void SetTransform( const wxGraphicsMatrix& matrix );
 372
 373     // gets the matrix of this context
 374     virtual wxGraphicsMatrix GetTransform() const;
 375
 376     virtual void DrawBitmap( const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 377     virtual void DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 378     virtual void DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 379     virtual void PushState();
 380     virtual void PopState();
 381
 382     virtual void GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
 383         wxDouble *descent, wxDouble *externalLeading ) const;
 384     virtual void GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const;
 385     virtual bool ShouldOffset() const;
 386     virtual void GetSize( wxDouble* width, wxDouble *height );
 387
 388     Graphics* GetGraphics() const { return m_context; }
 389
 390 protected:
 391
 392     wxDouble m_fontScaleRatio;
 393
 394     // Used from ctors (including those in the derived classes) and takes
 395     // ownership of the graphics pointer that must be non-NULL.
 396     void Init(Graphics* graphics, int width, int height);
 397
 398 private:
 399     virtual void DoDrawText(const wxString& str, wxDouble x, wxDouble y)
 400         { DoDrawFilledText(str, x, y, wxNullGraphicsBrush); }
 401     virtual void DoDrawFilledText(const wxString& str, wxDouble x, wxDouble y,
 402                                   const wxGraphicsBrush& backgroundBrush);
 403
 404     Graphics* m_context;
 405     wxStack<GraphicsState> m_stateStack;
 406     GraphicsState m_state1;
 407     GraphicsState m_state2;
 408
 409     wxDECLARE_NO_COPY_CLASS(wxGDIPlusContext);
 410 };
 411
 412 #if wxUSE_IMAGE
 413
 414 class wxGDIPlusImageContext : public wxGDIPlusContext
 415 {
 416 public:
 417     wxGDIPlusImageContext(wxGraphicsRenderer* renderer, wxImage& image) :
 418         wxGDIPlusContext(renderer),
 419         m_image(image),
 420         m_bitmap(renderer, image)
 421     {
 422         Init
 423         (
 424             new Graphics(m_bitmap.GetGDIPlusBitmap()),
 425             image.GetWidth(),
 426             image.GetHeight()
 427         );
 428     }
 429
 430     virtual ~wxGDIPlusImageContext()
 431     {
 432         m_image = m_bitmap.ConvertToImage();
 433     }
 434
 435 private:
 436     wxImage& m_image;
 437     wxGDIPlusBitmapData m_bitmap;
 438
 439     wxDECLARE_NO_COPY_CLASS(wxGDIPlusImageContext);
 440 };
 441
 442 #endif // wxUSE_IMAGE
 443
 444 class wxGDIPlusMeasuringContext : public wxGDIPlusContext
 445 {
 446 public:
 447     wxGDIPlusMeasuringContext( wxGraphicsRenderer* renderer ) : wxGDIPlusContext( renderer , m_hdc = GetDC(NULL), 1000, 1000 )
 448     {
 449     }
 450
 451     virtual ~wxGDIPlusMeasuringContext()
 452     {
 453         ReleaseDC( NULL, m_hdc );
 454     }
 455
 456 private:
 457     HDC m_hdc ;
 458 } ;
 459
 460 class wxGDIPlusPrintingContext : public wxGDIPlusContext
 461 {
 462 public:
 463     wxGDIPlusPrintingContext( wxGraphicsRenderer* renderer, const wxDC& dc );
 464     virtual ~wxGDIPlusPrintingContext() { }
 465 protected:
 466 };
 467
 468 //-----------------------------------------------------------------------------
 469 // wxGDIPlusRenderer declaration
 470 //-----------------------------------------------------------------------------
 471
 472 class wxGDIPlusRenderer : public wxGraphicsRenderer
 473 {
 474 public :
 475     wxGDIPlusRenderer()
 476     {
 477         m_loaded = -1;
 478         m_gditoken = 0;
 479     }
 480
 481     virtual ~wxGDIPlusRenderer()
 482     {
 483         if ( m_loaded == 1 )
 484         {
 485             Unload();
 486         }
 487     }
 488
 489     // Context
 490
 491     virtual wxGraphicsContext * CreateContext( const wxWindowDC& dc);
 492
 493     virtual wxGraphicsContext * CreateContext( const wxMemoryDC& dc);
 494
 495 #if wxUSE_PRINTING_ARCHITECTURE
 496     virtual wxGraphicsContext * CreateContext( const wxPrinterDC& dc);
 497 #endif
 498
 499 #if wxUSE_ENH_METAFILE
 500     virtual wxGraphicsContext * CreateContext( const wxEnhMetaFileDC& dc);
 501 #endif
 502
 503     virtual wxGraphicsContext * CreateContextFromNativeContext( void * context );
 504
 505     virtual wxGraphicsContext * CreateContextFromNativeWindow( void * window );
 506
 507     virtual wxGraphicsContext * CreateContext( wxWindow* window );
 508
 509 #if wxUSE_IMAGE
 510     virtual wxGraphicsContext * CreateContextFromImage(wxImage& image);
 511 #endif // wxUSE_IMAGE
 512
 513     virtual wxGraphicsContext * CreateMeasuringContext();
 514
 515     // Path
 516
 517     virtual wxGraphicsPath CreatePath();
 518
 519     // Matrix
 520
 521     virtual wxGraphicsMatrix CreateMatrix( wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
 522         wxDouble tx=0.0, wxDouble ty=0.0);
 523
 524
 525     virtual wxGraphicsPen CreatePen(const wxPen& pen) ;
 526
 527     virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) ;
 528
 529     virtual wxGraphicsBrush
 530     CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
 531                               wxDouble x2, wxDouble y2,
 532                               const wxGraphicsGradientStops& stops);
 533
 534     virtual wxGraphicsBrush
 535     CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
 536                               wxDouble xc, wxDouble yc,
 537                               wxDouble radius,
 538                               const wxGraphicsGradientStops& stops);
 539
 540     // create a native bitmap representation
 541     virtual wxGraphicsBitmap CreateBitmap( const wxBitmap &bitmap );
 542 #if wxUSE_IMAGE
 543     virtual wxGraphicsBitmap CreateBitmapFromImage(const wxImage& image);
 544     virtual wxImage CreateImageFromBitmap(const wxGraphicsBitmap& bmp);
 545 #endif // wxUSE_IMAGE
 546
 547     virtual wxGraphicsFont CreateFont( const wxFont& font,
 548                                        const wxColour& col);
 549
 550     virtual wxGraphicsFont CreateFont(double size,
 551                                       const wxString& facename,
 552                                       int flags = wxFONTFLAG_DEFAULT,
 553                                       const wxColour& col = *wxBLACK);
 554
 555     // create a graphics bitmap from a native bitmap
 556     virtual wxGraphicsBitmap CreateBitmapFromNativeBitmap( void* bitmap );
 557
 558     // create a subimage from a native image representation
 559     virtual wxGraphicsBitmap CreateSubBitmap( const wxGraphicsBitmap &bitmap, wxDouble x, wxDouble y, wxDouble w, wxDouble h  );
 560
 561 protected :
 562     bool EnsureIsLoaded();
 563     void Load();
 564     void Unload();
 565     friend class wxGDIPlusRendererModule;
 566
 567 private :
 568     int m_loaded;
 569     ULONG_PTR m_gditoken;
 570
 571     DECLARE_DYNAMIC_CLASS_NO_COPY(wxGDIPlusRenderer)
 572 } ;
 573
 574 //-----------------------------------------------------------------------------
 575 // wxGDIPlusPen implementation
 576 //-----------------------------------------------------------------------------
 577
 578 wxGDIPlusPenData::~wxGDIPlusPenData()
 579 {
 580     delete m_pen;
 581     delete m_penImage;
 582     delete m_penBrush;
 583 }
 584
 585 void wxGDIPlusPenData::Init()
 586 {
 587     m_pen = NULL ;
 588     m_penImage = NULL;
 589     m_penBrush = NULL;
 590 }
 591
 592 wxGDIPlusPenData::wxGDIPlusPenData( wxGraphicsRenderer* renderer, const wxPen &pen )
 593 : wxGraphicsObjectRefData(renderer)
 594 {
 595     Init();
 596     m_width = pen.GetWidth();
 597     if (m_width <= 0.0)
 598         m_width = 0.1;
 599
 600     m_pen = new Pen(wxColourToColor(pen.GetColour()), m_width );
 601
 602     LineCap cap;
 603     switch ( pen.GetCap() )
 604     {
 605     case wxCAP_ROUND :
 606         cap = LineCapRound;
 607         break;
 608
 609     case wxCAP_PROJECTING :
 610         cap = LineCapSquare;
 611         break;
 612
 613     case wxCAP_BUTT :
 614         cap = LineCapFlat; // TODO verify
 615         break;
 616
 617     default :
 618         cap = LineCapFlat;
 619         break;
 620     }
 621     m_pen->SetLineCap(cap,cap, DashCapFlat);
 622
 623     LineJoin join;
 624     switch ( pen.GetJoin() )
 625     {
 626     case wxJOIN_BEVEL :
 627         join = LineJoinBevel;
 628         break;
 629
 630     case wxJOIN_MITER :
 631         join = LineJoinMiter;
 632         break;
 633
 634     case wxJOIN_ROUND :
 635         join = LineJoinRound;
 636         break;
 637
 638     default :
 639         join = LineJoinMiter;
 640         break;
 641     }
 642
 643     m_pen->SetLineJoin(join);
 644
 645     m_pen->SetDashStyle(DashStyleSolid);
 646
 647     DashStyle dashStyle = DashStyleSolid;
 648     switch ( pen.GetStyle() )
 649     {
 650     case wxPENSTYLE_SOLID :
 651         break;
 652
 653     case wxPENSTYLE_DOT :
 654         dashStyle = DashStyleDot;
 655         break;
 656
 657     case wxPENSTYLE_LONG_DASH :
 658         dashStyle = DashStyleDash; // TODO verify
 659         break;
 660
 661     case wxPENSTYLE_SHORT_DASH :
 662         dashStyle = DashStyleDash;
 663         break;
 664
 665     case wxPENSTYLE_DOT_DASH :
 666         dashStyle = DashStyleDashDot;
 667         break;
 668     case wxPENSTYLE_USER_DASH :
 669         {
 670             dashStyle = DashStyleCustom;
 671             wxDash *dashes;
 672             int count = pen.GetDashes( &dashes );
 673             if ((dashes != NULL) && (count > 0))
 674             {
 675                 REAL *userLengths = new REAL[count];
 676                 for ( int i = 0; i < count; ++i )
 677                 {
 678                     userLengths[i] = dashes[i];
 679                 }
 680                 m_pen->SetDashPattern( userLengths, count);
 681                 delete[] userLengths;
 682             }
 683         }
 684         break;
 685     case wxPENSTYLE_STIPPLE :
 686         {
 687             wxBitmap* bmp = pen.GetStipple();
 688             if ( bmp && bmp->IsOk() )
 689             {
 690                 m_penImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),
 691 #if wxUSE_PALETTE
 692                     (HPALETTE)bmp->GetPalette()->GetHPALETTE()
 693 #else
 694                     NULL
 695 #endif
 696                 );
 697                 m_penBrush = new TextureBrush(m_penImage);
 698                 m_pen->SetBrush( m_penBrush );
 699             }
 700
 701         }
 702         break;
 703     default :
 704         if ( pen.GetStyle() >= wxPENSTYLE_FIRST_HATCH &&
 705              pen.GetStyle() <= wxPENSTYLE_LAST_HATCH )
 706         {
 707             HatchStyle style;
 708             switch( pen.GetStyle() )
 709             {
 710             case wxPENSTYLE_BDIAGONAL_HATCH :
 711                 style = HatchStyleBackwardDiagonal;
 712                 break ;
 713             case wxPENSTYLE_CROSSDIAG_HATCH :
 714                 style = HatchStyleDiagonalCross;
 715                 break ;
 716             case wxPENSTYLE_FDIAGONAL_HATCH :
 717                 style = HatchStyleForwardDiagonal;
 718                 break ;
 719             case wxPENSTYLE_CROSS_HATCH :
 720                 style = HatchStyleCross;
 721                 break ;
 722             case wxPENSTYLE_HORIZONTAL_HATCH :
 723                 style = HatchStyleHorizontal;
 724                 break ;
 725             case wxPENSTYLE_VERTICAL_HATCH :
 726                 style = HatchStyleVertical;
 727                 break ;
 728             default:
 729                 style = HatchStyleHorizontal;
 730             }
 731             m_penBrush = new HatchBrush
 732                              (
 733                                 style,
 734                                 wxColourToColor(pen.GetColour()),
 735                                 Color::Transparent
 736                              );
 737             m_pen->SetBrush( m_penBrush );
 738         }
 739         break;
 740     }
 741     if ( dashStyle != DashStyleSolid )
 742         m_pen->SetDashStyle(dashStyle);
 743 }
 744
 745 //-----------------------------------------------------------------------------
 746 // wxGDIPlusBrush implementation
 747 //-----------------------------------------------------------------------------
 748
 749 wxGDIPlusBrushData::wxGDIPlusBrushData( wxGraphicsRenderer* renderer )
 750 : wxGraphicsObjectRefData(renderer)
 751 {
 752     Init();
 753 }
 754
 755 wxGDIPlusBrushData::wxGDIPlusBrushData( wxGraphicsRenderer* renderer , const wxBrush &brush )
 756 : wxGraphicsObjectRefData(renderer)
 757 {
 758     Init();
 759     if ( brush.GetStyle() == wxSOLID)
 760     {
 761         m_brush = new SolidBrush(wxColourToColor( brush.GetColour()));
 762     }
 763     else if ( brush.IsHatch() )
 764     {
 765         HatchStyle style;
 766         switch( brush.GetStyle() )
 767         {
 768         case wxBRUSHSTYLE_BDIAGONAL_HATCH :
 769             style = HatchStyleBackwardDiagonal;
 770             break ;
 771         case wxBRUSHSTYLE_CROSSDIAG_HATCH :
 772             style = HatchStyleDiagonalCross;
 773             break ;
 774         case wxBRUSHSTYLE_FDIAGONAL_HATCH :
 775             style = HatchStyleForwardDiagonal;
 776             break ;
 777         case wxBRUSHSTYLE_CROSS_HATCH :
 778             style = HatchStyleCross;
 779             break ;
 780         case wxBRUSHSTYLE_HORIZONTAL_HATCH :
 781             style = HatchStyleHorizontal;
 782             break ;
 783         case wxBRUSHSTYLE_VERTICAL_HATCH :
 784             style = HatchStyleVertical;
 785             break ;
 786         default:
 787             style = HatchStyleHorizontal;
 788         }
 789         m_brush = new HatchBrush
 790                       (
 791                         style,
 792                         wxColourToColor(brush.GetColour()),
 793                         Color::Transparent
 794                       );
 795     }
 796     else
 797     {
 798         wxBitmap* bmp = brush.GetStipple();
 799         if ( bmp && bmp->IsOk() )
 800         {
 801             wxDELETE( m_brushImage );
 802             m_brushImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),
 803 #if wxUSE_PALETTE
 804                 (HPALETTE)bmp->GetPalette()->GetHPALETTE()
 805 #else
 806                 NULL
 807 #endif
 808             );
 809             m_brush = new TextureBrush(m_brushImage);
 810         }
 811     }
 812 }
 813
 814 wxGDIPlusBrushData::~wxGDIPlusBrushData()
 815 {
 816     delete m_brush;
 817     delete m_brushImage;
 818     delete m_brushPath;
 819 };
 820
 821 void wxGDIPlusBrushData::Init()
 822 {
 823     m_brush = NULL;
 824     m_brushImage= NULL;
 825     m_brushPath= NULL;
 826 }
 827
 828 template <typename T>
 829 void
 830 wxGDIPlusBrushData::SetGradientStops(T *brush,
 831         const wxGraphicsGradientStops& stops)
 832 {
 833     const unsigned numStops = stops.GetCount();
 834     if ( numStops <= 2 )
 835     {
 836         // initial and final colours are set during the brush creation, nothing
 837         // more to do
 838         return;
 839     }
 840
 841     wxVector<Color> colors(numStops);
 842     wxVector<REAL> positions(numStops);
 843
 844     for ( unsigned i = 0; i < numStops; i++ )
 845     {
 846         wxGraphicsGradientStop stop = stops.Item(i);
 847
 848         colors[i] = wxColourToColor(stop.GetColour());
 849         positions[i] = stop.GetPosition();
 850     }
 851
 852     brush->SetInterpolationColors(&colors[0], &positions[0], numStops);
 853 }
 854
 855 void
 856 wxGDIPlusBrushData::CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
 857                                               wxDouble x2, wxDouble y2,
 858                                               const wxGraphicsGradientStops& stops)
 859 {
 860     LinearGradientBrush * const
 861         brush = new LinearGradientBrush(PointF(x1, y1) , PointF(x2, y2),
 862                                         wxColourToColor(stops.GetStartColour()),
 863                                         wxColourToColor(stops.GetEndColour()));
 864     m_brush =  brush;
 865
 866     SetGradientStops(brush, stops);
 867 }
 868
 869 void
 870 wxGDIPlusBrushData::CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
 871                                               wxDouble xc, wxDouble yc,
 872                                               wxDouble radius,
 873                                               const wxGraphicsGradientStops& stops)
 874 {
 875     m_brushPath = new GraphicsPath();
 876     m_brushPath->AddEllipse( (REAL)(xc-radius), (REAL)(yc-radius),
 877                              (REAL)(2*radius), (REAL)(2*radius));
 878
 879     PathGradientBrush * const brush = new PathGradientBrush(m_brushPath);
 880     m_brush = brush;
 881     brush->SetCenterPoint(PointF(xo, yo));
 882     brush->SetCenterColor(wxColourToColor(stops.GetStartColour()));
 883
 884     const Color col(wxColourToColor(stops.GetEndColour()));
 885     int count = 1;
 886     brush->SetSurroundColors(&col, &count);
 887
 888     SetGradientStops(brush, stops);
 889 }
 890
 891 //-----------------------------------------------------------------------------
 892 // wxGDIPlusFont implementation
 893 //-----------------------------------------------------------------------------
 894
 895 void
 896 wxGDIPlusFontData::Init(const wxString& name,
 897                         REAL size,
 898                         int style,
 899                         const wxColour& col,
 900                         Unit fontUnit)
 901 {
 902     m_font = new Font(name.wc_str(), size, style, fontUnit);
 903
 904     m_textBrush = new SolidBrush(wxColourToColor(col));
 905 }
 906
 907 wxGDIPlusFontData::wxGDIPlusFontData( wxGraphicsRenderer* renderer,
 908                                       const wxFont &font,
 909                                       const wxColour& col )
 910     : wxGraphicsObjectRefData( renderer )
 911 {
 912     int style = FontStyleRegular;
 913     if ( font.GetStyle() == wxFONTSTYLE_ITALIC )
 914         style |= FontStyleItalic;
 915     if ( font.GetUnderlined() )
 916         style |= FontStyleUnderline;
 917     if ( font.GetWeight() == wxFONTWEIGHT_BOLD )
 918         style |= FontStyleBold;
 919
 920     Init(font.GetFaceName(), font.GetPointSize(), style, col, UnitPoint);
 921 }
 922
 923 wxGDIPlusFontData::wxGDIPlusFontData(wxGraphicsRenderer* renderer,
 924                                      const wxString& name,
 925                                      REAL sizeInPixels,
 926                                      int style,
 927                                      const wxColour& col) :
 928     wxGraphicsObjectRefData(renderer)
 929 {
 930     Init(name, sizeInPixels, style, col, UnitPixel);
 931 }
 932
 933 wxGDIPlusFontData::~wxGDIPlusFontData()
 934 {
 935     delete m_textBrush;
 936     delete m_font;
 937 }
 938
 939 // the built-in conversions functions create non-premultiplied bitmaps, while GDIPlus needs them in the
 940 // premultiplied format, therefore in the failing cases we create a new bitmap using the non-premultiplied
 941 // bytes as parameter, since there is no real copying of the data going in, only references are stored
 942 // m_helper has to be kept alive as well
 943
 944 //-----------------------------------------------------------------------------
 945 // wxGDIPlusBitmapData implementation
 946 //-----------------------------------------------------------------------------
 947
 948 wxGDIPlusBitmapData::wxGDIPlusBitmapData( wxGraphicsRenderer* renderer, Bitmap* bitmap ) :
 949     wxGraphicsObjectRefData( renderer ), m_bitmap( bitmap )
 950 {
 951     m_helper = NULL;
 952 }
 953
 954 wxGDIPlusBitmapData::wxGDIPlusBitmapData( wxGraphicsRenderer* renderer,
 955                         const wxBitmap &bmp) : wxGraphicsObjectRefData( renderer )
 956 {
 957     m_bitmap = NULL;
 958     m_helper = NULL;
 959
 960     Bitmap* image = NULL;
 961     if ( bmp.GetMask() )
 962     {
 963         Bitmap interim((HBITMAP)bmp.GetHBITMAP(),
 964 #if wxUSE_PALETTE
 965             (HPALETTE)bmp.GetPalette()->GetHPALETTE()
 966 #else
 967             NULL
 968 #endif
 969         );
 970
 971         size_t width = interim.GetWidth();
 972         size_t height = interim.GetHeight();
 973         Rect bounds(0,0,width,height);
 974
 975         image = new Bitmap(width,height,PixelFormat32bppPARGB) ;
 976
 977         Bitmap interimMask((HBITMAP)bmp.GetMask()->GetMaskBitmap(),NULL);
 978         wxASSERT(interimMask.GetPixelFormat() == PixelFormat1bppIndexed);
 979
 980         BitmapData dataMask ;
 981         interimMask.LockBits(&bounds,ImageLockModeRead,
 982             interimMask.GetPixelFormat(),&dataMask);
 983
 984
 985         BitmapData imageData ;
 986         image->LockBits(&bounds,ImageLockModeWrite, PixelFormat32bppPARGB, &imageData);
 987
 988         BYTE maskPattern = 0 ;
 989         BYTE maskByte = 0;
 990         size_t maskIndex ;
 991
 992         for ( size_t y = 0 ; y < height ; ++y)
 993         {
 994             maskIndex = 0 ;
 995             for( size_t x = 0 ; x < width; ++x)
 996             {
 997                 if ( x % 8 == 0)
 998                 {
 999                     maskPattern = 0x80;
1000                     maskByte = *((BYTE*)dataMask.Scan0 + dataMask.Stride*y + maskIndex);
1001                     maskIndex++;
1002                 }
1003                 else
1004                     maskPattern = maskPattern >> 1;
1005
1006                 ARGB *dest = (ARGB*)((BYTE*)imageData.Scan0 + imageData.Stride*y + x*4);
1007                 if ( (maskByte & maskPattern) == 0 )
1008                     *dest = 0x00000000;
1009                 else
1010                 {
1011                     Color c ;
1012                     interim.GetPixel(x,y,&c) ;
1013                     *dest = (c.GetValue() | Color::AlphaMask);
1014                 }
1015             }
1016         }
1017
1018         image->UnlockBits(&imageData);
1019
1020         interimMask.UnlockBits(&dataMask);
1021         interim.UnlockBits(&dataMask);
1022     }
1023     else
1024     {
1025         image = Bitmap::FromHBITMAP((HBITMAP)bmp.GetHBITMAP(),
1026 #if wxUSE_PALETTE
1027             (HPALETTE)bmp.GetPalette()->GetHPALETTE()
1028 #else
1029             NULL
1030 #endif
1031         );
1032         if ( bmp.HasAlpha() && GetPixelFormatSize(image->GetPixelFormat()) == 32 )
1033         {
1034             size_t width = image->GetWidth();
1035             size_t height = image->GetHeight();
1036             Rect bounds(0,0,width,height);
1037             static BitmapData data ;
1038
1039             m_helper = image ;
1040             image = NULL ;
1041             m_helper->LockBits(&bounds, ImageLockModeRead,
1042                 m_helper->GetPixelFormat(),&data);
1043
1044             image = new Bitmap(data.Width, data.Height, data.Stride,
1045                 PixelFormat32bppPARGB , (BYTE*) data.Scan0);
1046
1047             m_helper->UnlockBits(&data);
1048         }
1049     }
1050     if ( image )
1051         m_bitmap = image;
1052 }
1053
1054 #if wxUSE_IMAGE
1055
1056 wxImage wxGDIPlusBitmapData::ConvertToImage() const
1057 {
1058     // We could use Bitmap::LockBits() and convert to wxImage directly but
1059     // passing by wxBitmap is easier. It would be nice to measure performance
1060     // of the two methods but for this the second one would need to be written
1061     // first...
1062     HBITMAP hbmp;
1063     if ( m_bitmap->GetHBITMAP(Color(0xffffffff), &hbmp) != Gdiplus::Ok )
1064         return wxNullImage;
1065
1066     wxBitmap bmp;
1067     bmp.SetWidth(m_bitmap->GetWidth());
1068     bmp.SetHeight(m_bitmap->GetHeight());
1069     bmp.SetHBITMAP(hbmp);
1070     bmp.SetDepth(IsAlphaPixelFormat(m_bitmap->GetPixelFormat()) ? 32 : 24);
1071     return bmp.ConvertToImage();
1072 }
1073
1074 #endif // wxUSE_IMAGE
1075
1076 wxGDIPlusBitmapData::~wxGDIPlusBitmapData()
1077 {
1078     delete m_bitmap;
1079     delete m_helper;
1080 }
1081
1082 //-----------------------------------------------------------------------------
1083 // wxGDIPlusPath implementation
1084 //-----------------------------------------------------------------------------
1085
1086 wxGDIPlusPathData::wxGDIPlusPathData(wxGraphicsRenderer* renderer, GraphicsPath* path ) : wxGraphicsPathData(renderer)
1087 {
1088     if ( path )
1089         m_path = path;
1090     else
1091         m_path = new GraphicsPath();
1092 }
1093
1094 wxGDIPlusPathData::~wxGDIPlusPathData()
1095 {
1096     delete m_path;
1097 }
1098
1099 wxGraphicsObjectRefData* wxGDIPlusPathData::Clone() const
1100 {
1101     return new wxGDIPlusPathData( GetRenderer() , m_path->Clone());
1102 }
1103
1104 //
1105 // The Primitives
1106 //
1107
1108 void wxGDIPlusPathData::MoveToPoint( wxDouble x , wxDouble y )
1109 {
1110     m_path->StartFigure();
1111     m_path->AddLine((REAL) x,(REAL) y,(REAL) x,(REAL) y);
1112 }
1113
1114 void wxGDIPlusPathData::AddLineToPoint( wxDouble x , wxDouble y )
1115 {
1116     m_path->AddLine((REAL) x,(REAL) y,(REAL) x,(REAL) y);
1117 }
1118
1119 void wxGDIPlusPathData::CloseSubpath()
1120 {
1121     m_path->CloseFigure();
1122 }
1123
1124 void wxGDIPlusPathData::AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y )
1125 {
1126     PointF c1(cx1,cy1);
1127     PointF c2(cx2,cy2);
1128     PointF end(x,y);
1129     PointF start;
1130     m_path->GetLastPoint(&start);
1131     m_path->AddBezier(start,c1,c2,end);
1132 }
1133
1134 // gets the last point of the current path, (0,0) if not yet set
1135 void wxGDIPlusPathData::GetCurrentPoint( wxDouble* x, wxDouble* y) const
1136 {
1137     PointF start;
1138     m_path->GetLastPoint(&start);
1139     *x = start.X ;
1140     *y = start.Y ;
1141 }
1142
1143 void wxGDIPlusPathData::AddArc( wxDouble x, wxDouble y, wxDouble r, double startAngle, double endAngle, bool clockwise )
1144 {
1145     double sweepAngle = endAngle - startAngle ;
1146     if( fabs(sweepAngle) >= 2*M_PI)
1147     {
1148         sweepAngle = 2 * M_PI;
1149     }
1150     else
1151     {
1152         if ( clockwise )
1153         {
1154             if( sweepAngle < 0 )
1155                 sweepAngle += 2 * M_PI;
1156         }
1157         else
1158         {
1159             if( sweepAngle > 0 )
1160                 sweepAngle -= 2 * M_PI;
1161
1162         }
1163    }
1164    m_path->AddArc((REAL) (x-r),(REAL) (y-r),(REAL) (2*r),(REAL) (2*r),RadToDeg(startAngle),RadToDeg(sweepAngle));
1165 }
1166
1167 void wxGDIPlusPathData::AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1168 {
1169     m_path->AddRectangle(RectF(x,y,w,h));
1170 }
1171
1172 void wxGDIPlusPathData::AddPath( const wxGraphicsPathData* path )
1173 {
1174     m_path->AddPath( (GraphicsPath*) path->GetNativePath(), FALSE);
1175 }
1176
1177
1178 // transforms each point of this path by the matrix
1179 void wxGDIPlusPathData::Transform( const wxGraphicsMatrixData* matrix )
1180 {
1181     m_path->Transform( (Matrix*) matrix->GetNativeMatrix() );
1182 }
1183
1184 // gets the bounding box enclosing all points (possibly including control points)
1185 void wxGDIPlusPathData::GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const
1186 {
1187     RectF bounds;
1188     m_path->GetBounds( &bounds, NULL, NULL) ;
1189     *x = bounds.X;
1190     *y = bounds.Y;
1191     *w = bounds.Width;
1192     *h = bounds.Height;
1193 }
1194
1195 bool wxGDIPlusPathData::Contains( wxDouble x, wxDouble y, wxPolygonFillMode fillStyle ) const
1196 {
1197     m_path->SetFillMode( fillStyle == wxODDEVEN_RULE ? FillModeAlternate : FillModeWinding);
1198     return m_path->IsVisible( (FLOAT) x,(FLOAT) y) == TRUE ;
1199 }
1200
1201 //-----------------------------------------------------------------------------
1202 // wxGDIPlusMatrixData implementation
1203 //-----------------------------------------------------------------------------
1204
1205 wxGDIPlusMatrixData::wxGDIPlusMatrixData(wxGraphicsRenderer* renderer, Matrix* matrix )
1206     : wxGraphicsMatrixData(renderer)
1207 {
1208     if ( matrix )
1209         m_matrix = matrix ;
1210     else
1211         m_matrix = new Matrix();
1212 }
1213
1214 wxGDIPlusMatrixData::~wxGDIPlusMatrixData()
1215 {
1216     delete m_matrix;
1217 }
1218
1219 wxGraphicsObjectRefData *wxGDIPlusMatrixData::Clone() const
1220 {
1221     return new wxGDIPlusMatrixData( GetRenderer(), m_matrix->Clone());
1222 }
1223
1224 // concatenates the matrix
1225 void wxGDIPlusMatrixData::Concat( const wxGraphicsMatrixData *t )
1226 {
1227     m_matrix->Multiply( (Matrix*) t->GetNativeMatrix());
1228 }
1229
1230 // sets the matrix to the respective values
1231 void wxGDIPlusMatrixData::Set(wxDouble a, wxDouble b, wxDouble c, wxDouble d,
1232                  wxDouble tx, wxDouble ty)
1233 {
1234     m_matrix->SetElements(a,b,c,d,tx,ty);
1235 }
1236
1237 // gets the component valuess of the matrix
1238 void wxGDIPlusMatrixData::Get(wxDouble* a, wxDouble* b,  wxDouble* c,
1239                               wxDouble* d, wxDouble* tx, wxDouble* ty) const
1240 {
1241     REAL elements[6];
1242     m_matrix->GetElements(elements);
1243     if (a)  *a = elements[0];
1244     if (b)  *b = elements[1];
1245     if (c)  *c = elements[2];
1246     if (d)  *d = elements[3];
1247     if (tx) *tx= elements[4];
1248     if (ty) *ty= elements[5];
1249 }
1250
1251 // makes this the inverse matrix
1252 void wxGDIPlusMatrixData::Invert()
1253 {
1254     m_matrix->Invert();
1255 }
1256
1257 // returns true if the elements of the transformation matrix are equal ?
1258 bool wxGDIPlusMatrixData::IsEqual( const wxGraphicsMatrixData* t) const
1259 {
1260     return m_matrix->Equals((Matrix*) t->GetNativeMatrix())== TRUE ;
1261 }
1262
1263 // return true if this is the identity matrix
1264 bool wxGDIPlusMatrixData::IsIdentity() const
1265 {
1266     return m_matrix->IsIdentity() == TRUE ;
1267 }
1268
1269 //
1270 // transformation
1271 //
1272
1273 // add the translation to this matrix
1274 void wxGDIPlusMatrixData::Translate( wxDouble dx , wxDouble dy )
1275 {
1276     m_matrix->Translate(dx,dy);
1277 }
1278
1279 // add the scale to this matrix
1280 void wxGDIPlusMatrixData::Scale( wxDouble xScale , wxDouble yScale )
1281 {
1282     m_matrix->Scale(xScale,yScale);
1283 }
1284
1285 // add the rotation to this matrix (radians)
1286 void wxGDIPlusMatrixData::Rotate( wxDouble angle )
1287 {
1288     m_matrix->Rotate( RadToDeg(angle) );
1289 }
1290
1291 //
1292 // apply the transforms
1293 //
1294
1295 // applies that matrix to the point
1296 void wxGDIPlusMatrixData::TransformPoint( wxDouble *x, wxDouble *y ) const
1297 {
1298     PointF pt(*x,*y);
1299     m_matrix->TransformPoints(&pt);
1300     *x = pt.X;
1301     *y = pt.Y;
1302 }
1303
1304 // applies the matrix except for translations
1305 void wxGDIPlusMatrixData::TransformDistance( wxDouble *dx, wxDouble *dy ) const
1306 {
1307     PointF pt(*dx,*dy);
1308     m_matrix->TransformVectors(&pt);
1309     *dx = pt.X;
1310     *dy = pt.Y;
1311 }
1312
1313 // returns the native representation
1314 void * wxGDIPlusMatrixData::GetNativeMatrix() const
1315 {
1316     return m_matrix;
1317 }
1318
1319 //-----------------------------------------------------------------------------
1320 // wxGDIPlusContext implementation
1321 //-----------------------------------------------------------------------------
1322
1323 class wxGDIPlusOffsetHelper
1324 {
1325 public :
1326     wxGDIPlusOffsetHelper( Graphics* gr , bool offset )
1327     {
1328         m_gr = gr;
1329         m_offset = offset;
1330         if ( m_offset )
1331             m_gr->TranslateTransform( 0.5, 0.5 );
1332     }
1333     ~wxGDIPlusOffsetHelper( )
1334     {
1335         if ( m_offset )
1336             m_gr->TranslateTransform( -0.5, -0.5 );
1337     }
1338 public :
1339     Graphics* m_gr;
1340     bool m_offset;
1341 } ;
1342
1343 wxGDIPlusContext::wxGDIPlusContext( wxGraphicsRenderer* renderer, HDC hdc, wxDouble width, wxDouble height   )
1344     : wxGraphicsContext(renderer)
1345 {
1346     Init(new Graphics(hdc), width, height);
1347 }
1348
1349 wxGDIPlusContext::wxGDIPlusContext( wxGraphicsRenderer* renderer, const wxDC& dc )
1350     : wxGraphicsContext(renderer)
1351 {
1352     wxMSWDCImpl *msw = wxDynamicCast( dc.GetImpl() , wxMSWDCImpl );
1353     HDC hdc = (HDC) msw->GetHDC();
1354     wxSize sz = dc.GetSize();
1355
1356     Init(new Graphics(hdc), sz.x, sz.y);
1357 }
1358
1359 wxGDIPlusContext::wxGDIPlusContext( wxGraphicsRenderer* renderer, HWND hwnd  )
1360     : wxGraphicsContext(renderer)
1361 {
1362     RECT rect = wxGetWindowRect(hwnd);
1363     Init(new Graphics(hwnd), rect.right - rect.left, rect.bottom - rect.top);
1364     m_enableOffset = true;
1365 }
1366
1367 wxGDIPlusContext::wxGDIPlusContext( wxGraphicsRenderer* renderer, Graphics* gr  )
1368     : wxGraphicsContext(renderer)
1369 {
1370     Init(gr, 0, 0);
1371 }
1372
1373 wxGDIPlusContext::wxGDIPlusContext(wxGraphicsRenderer* renderer)
1374     : wxGraphicsContext(renderer)
1375 {
1376     // Derived class must call Init() later but just set m_context to NULL for
1377     // safety to avoid crashing in our dtor if Init() ends up not being called.
1378     m_context = NULL;
1379 }
1380
1381 void wxGDIPlusContext::Init(Graphics* graphics, int width, int height)
1382 {
1383     m_context = graphics;
1384     m_state1 = 0;
1385     m_state2 = 0;
1386     m_width = width;
1387     m_height = height;
1388     m_fontScaleRatio = 1.0;
1389
1390     m_context->SetTextRenderingHint(TextRenderingHintSystemDefault);
1391     m_context->SetPixelOffsetMode(PixelOffsetModeHalf);
1392     m_context->SetSmoothingMode(SmoothingModeHighQuality);
1393     m_state1 = m_context->Save();
1394     m_state2 = m_context->Save();
1395 }
1396
1397 wxGDIPlusContext::~wxGDIPlusContext()
1398 {
1399     if ( m_context )
1400     {
1401         m_context->Restore( m_state2 );
1402         m_context->Restore( m_state1 );
1403         delete m_context;
1404     }
1405 }
1406
1407
1408 void wxGDIPlusContext::Clip( const wxRegion &region )
1409 {
1410     Region rgn((HRGN)region.GetHRGN());
1411     m_context->SetClip(&rgn,CombineModeIntersect);
1412 }
1413
1414 void wxGDIPlusContext::Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1415 {
1416     m_context->SetClip(RectF(x,y,w,h),CombineModeIntersect);
1417 }
1418
1419 void wxGDIPlusContext::ResetClip()
1420 {
1421     m_context->ResetClip();
1422 }
1423
1424 void wxGDIPlusContext::DrawRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1425 {
1426     if (m_composition == wxCOMPOSITION_DEST)
1427         return;
1428
1429     wxGDIPlusOffsetHelper helper( m_context , ShouldOffset() );
1430     Brush *brush = m_brush.IsNull() ? NULL : ((wxGDIPlusBrushData*)m_brush.GetRefData())->GetGDIPlusBrush();
1431     Pen *pen = m_pen.IsNull() ? NULL : ((wxGDIPlusPenData*)m_pen.GetGraphicsData())->GetGDIPlusPen();
1432
1433     if ( brush )
1434     {
1435         // the offset is used to fill only the inside of the rectangle and not paint underneath
1436         // its border which may influence a transparent Pen
1437         REAL offset = 0;
1438         if ( pen )
1439              offset = pen->GetWidth();
1440         m_context->FillRectangle( brush, (REAL)x + offset/2, (REAL)y + offset/2, (REAL)w - offset, (REAL)h - offset);
1441     }
1442
1443     if ( pen )
1444     {
1445         m_context->DrawRectangle( pen, (REAL)x, (REAL)y, (REAL)w, (REAL)h );
1446     }
1447 }
1448
1449 void wxGDIPlusContext::StrokeLines( size_t n, const wxPoint2DDouble *points)
1450 {
1451    if (m_composition == wxCOMPOSITION_DEST)
1452         return;
1453
1454    if ( !m_pen.IsNull() )
1455    {
1456        wxGDIPlusOffsetHelper helper( m_context , ShouldOffset() );
1457        Point *cpoints = new Point[n];
1458        for (size_t i = 0; i < n; i++)
1459        {
1460            cpoints[i].X = (int)(points[i].m_x );
1461            cpoints[i].Y = (int)(points[i].m_y );
1462
1463        } // for (size_t i = 0; i < n; i++)
1464        m_context->DrawLines( ((wxGDIPlusPenData*)m_pen.GetGraphicsData())->GetGDIPlusPen() , cpoints , n ) ;
1465        delete[] cpoints;
1466    }
1467 }
1468
1469 void wxGDIPlusContext::DrawLines( size_t n, const wxPoint2DDouble *points, wxPolygonFillMode WXUNUSED(fillStyle) )
1470 {
1471    if (m_composition == wxCOMPOSITION_DEST)
1472         return;
1473
1474     wxGDIPlusOffsetHelper helper( m_context , ShouldOffset() );
1475     Point *cpoints = new Point[n];
1476     for (size_t i = 0; i < n; i++)
1477     {
1478         cpoints[i].X = (int)(points[i].m_x );
1479         cpoints[i].Y = (int)(points[i].m_y );
1480
1481     } // for (int i = 0; i < n; i++)
1482     if ( !m_brush.IsNull() )
1483         m_context->FillPolygon( ((wxGDIPlusBrushData*)m_brush.GetRefData())->GetGDIPlusBrush() , cpoints , n ) ;
1484     if ( !m_pen.IsNull() )
1485         m_context->DrawLines( ((wxGDIPlusPenData*)m_pen.GetGraphicsData())->GetGDIPlusPen() , cpoints , n ) ;
1486     delete[] cpoints;
1487 }
1488
1489 void wxGDIPlusContext::StrokePath( const wxGraphicsPath& path )
1490 {
1491    if (m_composition == wxCOMPOSITION_DEST)
1492         return;
1493
1494     if ( !m_pen.IsNull() )
1495     {
1496         wxGDIPlusOffsetHelper helper( m_context , ShouldOffset() );
1497         m_context->DrawPath( ((wxGDIPlusPenData*)m_pen.GetGraphicsData())->GetGDIPlusPen() , (GraphicsPath*) path.GetNativePath() );
1498     }
1499 }
1500
1501 void wxGDIPlusContext::FillPath( const wxGraphicsPath& path , wxPolygonFillMode fillStyle )
1502 {
1503    if (m_composition == wxCOMPOSITION_DEST)
1504         return;
1505
1506     if ( !m_brush.IsNull() )
1507     {
1508         wxGDIPlusOffsetHelper helper( m_context , ShouldOffset() );
1509         ((GraphicsPath*) path.GetNativePath())->SetFillMode( fillStyle == wxODDEVEN_RULE ? FillModeAlternate : FillModeWinding);
1510         m_context->FillPath( ((wxGDIPlusBrushData*)m_brush.GetRefData())->GetGDIPlusBrush() ,
1511             (GraphicsPath*) path.GetNativePath());
1512     }
1513 }
1514
1515 bool wxGDIPlusContext::SetAntialiasMode(wxAntialiasMode antialias)
1516 {
1517     if (m_antialias == antialias)
1518         return true;
1519
1520     m_antialias = antialias;
1521
1522     SmoothingMode antialiasMode;
1523     switch (antialias)
1524     {
1525         case wxANTIALIAS_DEFAULT:
1526             antialiasMode = SmoothingModeHighQuality;
1527             break;
1528         case wxANTIALIAS_NONE:
1529             antialiasMode = SmoothingModeNone;
1530             break;
1531         default:
1532             return false;
1533     }
1534     m_context->SetSmoothingMode(antialiasMode);
1535     return true;
1536 }
1537
1538 bool wxGDIPlusContext::SetInterpolationQuality(wxInterpolationQuality WXUNUSED(interpolation))
1539 {
1540     // placeholder
1541     return false;
1542 }
1543
1544 bool wxGDIPlusContext::SetCompositionMode(wxCompositionMode op)
1545 {
1546     if ( m_composition == op )
1547         return true;
1548
1549     m_composition = op;
1550
1551     if (m_composition == wxCOMPOSITION_DEST)
1552         return true;
1553
1554     CompositingMode cop;
1555     switch (op)
1556     {
1557         case wxCOMPOSITION_SOURCE:
1558             cop = CompositingModeSourceCopy;
1559             break;
1560         case wxCOMPOSITION_OVER:
1561             cop = CompositingModeSourceOver;
1562             break;
1563         default:
1564             return false;
1565     }
1566
1567     m_context->SetCompositingMode(cop);
1568     return true;
1569 }
1570
1571 void wxGDIPlusContext::BeginLayer(wxDouble /* opacity */)
1572 {
1573     // TODO
1574 }
1575
1576 void wxGDIPlusContext::EndLayer()
1577 {
1578     // TODO
1579 }
1580
1581 void wxGDIPlusContext::Rotate( wxDouble angle )
1582 {
1583     m_context->RotateTransform( RadToDeg(angle) );
1584 }
1585
1586 void wxGDIPlusContext::Translate( wxDouble dx , wxDouble dy )
1587 {
1588     m_context->TranslateTransform( dx , dy );
1589 }
1590
1591 void wxGDIPlusContext::Scale( wxDouble xScale , wxDouble yScale )
1592 {
1593     m_context->ScaleTransform(xScale,yScale);
1594 }
1595
1596 void wxGDIPlusContext::PushState()
1597 {
1598     GraphicsState state = m_context->Save();
1599     m_stateStack.push(state);
1600 }
1601
1602 void wxGDIPlusContext::PopState()
1603 {
1604     wxCHECK_RET( !m_stateStack.empty(), wxT("No state to pop") );
1605
1606     GraphicsState state = m_stateStack.top();
1607     m_stateStack.pop();
1608     m_context->Restore(state);
1609 }
1610
1611 void wxGDIPlusContext::DrawBitmap( const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1612 {
1613    if (m_composition == wxCOMPOSITION_DEST)
1614         return;
1615
1616     Bitmap* image = static_cast<wxGDIPlusBitmapData*>(bmp.GetRefData())->GetGDIPlusBitmap();
1617     if ( image )
1618     {
1619         if( image->GetWidth() != (UINT) w || image->GetHeight() != (UINT) h )
1620         {
1621             Rect drawRect((REAL) x, (REAL)y, (REAL)w, (REAL)h);
1622             m_context->SetPixelOffsetMode( PixelOffsetModeNone );
1623             m_context->DrawImage(image, drawRect, 0 , 0 , image->GetWidth(), image->GetHeight(), UnitPixel ) ;
1624             m_context->SetPixelOffsetMode( PixelOffsetModeHalf );
1625         }
1626         else
1627             m_context->DrawImage(image,(REAL) x,(REAL) y,(REAL) w,(REAL) h) ;
1628     }
1629 }
1630
1631 void wxGDIPlusContext::DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1632 {
1633     wxGraphicsBitmap bitmap = GetRenderer()->CreateBitmap(bmp);
1634     DrawBitmap(bitmap, x, y, w, h);
1635 }
1636
1637 void wxGDIPlusContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1638 {
1639    if (m_composition == wxCOMPOSITION_DEST)
1640         return;
1641
1642     // the built-in conversion fails when there is alpha in the HICON (eg XP style icons), we can only
1643     // find out by looking at the bitmap data whether there really was alpha in it
1644     HICON hIcon = (HICON)icon.GetHICON();
1645     ICONINFO iconInfo ;
1646     // IconInfo creates the bitmaps for color and mask, we must dispose of them after use
1647     if (!GetIconInfo(hIcon,&iconInfo))
1648         return;
1649
1650     Bitmap interim(iconInfo.hbmColor,NULL);
1651
1652     Bitmap* image = NULL ;
1653
1654     // if it's not 32 bit, it doesn't have an alpha channel, note that since the conversion doesn't
1655     // work correctly, asking IsAlphaPixelFormat at this point fails as well
1656     if( GetPixelFormatSize(interim.GetPixelFormat())!= 32 )
1657     {
1658         image = Bitmap::FromHICON(hIcon);
1659     }
1660     else
1661     {
1662         size_t width = interim.GetWidth();
1663         size_t height = interim.GetHeight();
1664         Rect bounds(0,0,width,height);
1665         BitmapData data ;
1666
1667         interim.LockBits(&bounds, ImageLockModeRead,
1668             interim.GetPixelFormat(),&data);
1669
1670         bool hasAlpha = false;
1671         for ( size_t y = 0 ; y < height && !hasAlpha ; ++y)
1672         {
1673             for( size_t x = 0 ; x < width && !hasAlpha; ++x)
1674             {
1675                 ARGB *dest = (ARGB*)((BYTE*)data.Scan0 + data.Stride*y + x*4);
1676                 if ( ( *dest & Color::AlphaMask ) != 0 )
1677                     hasAlpha = true;
1678             }
1679         }
1680
1681         if ( hasAlpha )
1682         {
1683         image = new Bitmap(data.Width, data.Height, data.Stride,
1684             PixelFormat32bppARGB , (BYTE*) data.Scan0);
1685         }
1686         else
1687         {
1688             image = Bitmap::FromHICON(hIcon);
1689         }
1690
1691         interim.UnlockBits(&data);
1692     }
1693
1694     m_context->DrawImage(image,(REAL) x,(REAL) y,(REAL) w,(REAL) h) ;
1695
1696     delete image ;
1697     DeleteObject(iconInfo.hbmColor);
1698     DeleteObject(iconInfo.hbmMask);
1699 }
1700
1701 void wxGDIPlusContext::DoDrawFilledText(const wxString& str,
1702                                         wxDouble x, wxDouble y,
1703                                         const wxGraphicsBrush& brush)
1704 {
1705    if (m_composition == wxCOMPOSITION_DEST)
1706         return;
1707
1708     wxCHECK_RET( !m_font.IsNull(),
1709                  wxT("wxGDIPlusContext::DrawText - no valid font set") );
1710
1711     if ( str.IsEmpty())
1712         return ;
1713
1714     wxGDIPlusFontData * const
1715         fontData = (wxGDIPlusFontData *)m_font.GetRefData();
1716     wxGDIPlusBrushData * const
1717         brushData = (wxGDIPlusBrushData *)brush.GetRefData();
1718
1719     m_context->DrawString
1720                (
1721                     str.wc_str(*wxConvUI),  // string to draw, always Unicode
1722                     -1,                     // length: string is NUL-terminated
1723                     fontData->GetGDIPlusFont(),
1724                     PointF(x, y),
1725                     StringFormat::GenericTypographic(),
1726                     brushData ? brushData->GetGDIPlusBrush()
1727                               : fontData->GetGDIPlusBrush()
1728                );
1729 }
1730
1731 void wxGDIPlusContext::GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
1732                                      wxDouble *descent, wxDouble *externalLeading ) const
1733 {
1734     wxCHECK_RET( !m_font.IsNull(), wxT("wxGDIPlusContext::GetTextExtent - no valid font set") );
1735
1736     wxWCharBuffer s = str.wc_str( *wxConvUI );
1737     FontFamily ffamily ;
1738     Font* f = ((wxGDIPlusFontData*)m_font.GetRefData())->GetGDIPlusFont();
1739
1740     f->GetFamily(&ffamily) ;
1741
1742     REAL factorY = m_fontScaleRatio;
1743
1744     REAL rDescent = ffamily.GetCellDescent(FontStyleRegular) *
1745         f->GetSize() / ffamily.GetEmHeight(FontStyleRegular);
1746     REAL rAscent = ffamily.GetCellAscent(FontStyleRegular) *
1747         f->GetSize() / ffamily.GetEmHeight(FontStyleRegular);
1748     REAL rHeight = ffamily.GetLineSpacing(FontStyleRegular) *
1749         f->GetSize() / ffamily.GetEmHeight(FontStyleRegular);
1750
1751     if ( height )
1752         *height = rHeight * factorY;
1753     if ( descent )
1754         *descent = rDescent * factorY;
1755     if ( externalLeading )
1756         *externalLeading = (rHeight - rAscent - rDescent) * factorY;
1757     // measuring empty strings is not guaranteed, so do it by hand
1758     if ( str.IsEmpty())
1759     {
1760         if ( width )
1761             *width = 0 ;
1762     }
1763     else
1764     {
1765         RectF layoutRect(0,0, 100000.0f, 100000.0f);
1766         StringFormat strFormat( StringFormat::GenericTypographic() );
1767         strFormat.SetFormatFlags( StringFormatFlagsMeasureTrailingSpaces | strFormat.GetFormatFlags() );
1768
1769         RectF bounds ;
1770         m_context->MeasureString((const wchar_t *) s , wcslen(s) , f, layoutRect, &strFormat, &bounds ) ;
1771         if ( width )
1772             *width = bounds.Width;
1773         if ( height )
1774             *height = bounds.Height;
1775     }
1776 }
1777
1778 void wxGDIPlusContext::GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const
1779 {
1780     widths.Empty();
1781     widths.Add(0, text.length());
1782
1783     wxCHECK_RET( !m_font.IsNull(), wxT("wxGDIPlusContext::GetPartialTextExtents - no valid font set") );
1784
1785     if (text.empty())
1786         return;
1787
1788     Font* f = ((wxGDIPlusFontData*)m_font.GetRefData())->GetGDIPlusFont();
1789     wxWCharBuffer ws = text.wc_str( *wxConvUI );
1790     size_t len = wcslen( ws ) ;
1791     wxASSERT_MSG(text.length() == len , wxT("GetPartialTextExtents not yet implemented for multichar situations"));
1792
1793     RectF layoutRect(0,0, 100000.0f, 100000.0f);
1794     StringFormat strFormat( StringFormat::GenericTypographic() );
1795
1796     size_t startPosition = 0;
1797     size_t remainder = len;
1798     const size_t maxSpan = 32;
1799     CharacterRange* ranges = new CharacterRange[maxSpan] ;
1800     Region* regions = new Region[maxSpan];
1801
1802     while( remainder > 0 )
1803     {
1804         size_t span = wxMin( maxSpan, remainder );
1805
1806         for( size_t i = 0 ; i < span ; ++i)
1807         {
1808             ranges[i].First = 0 ;
1809             ranges[i].Length = startPosition+i+1 ;
1810         }
1811         strFormat.SetMeasurableCharacterRanges(span,ranges);
1812         strFormat.SetFormatFlags( StringFormatFlagsMeasureTrailingSpaces | strFormat.GetFormatFlags() );
1813         m_context->MeasureCharacterRanges(ws, -1 , f,layoutRect, &strFormat,span,regions) ;
1814
1815         RectF bbox ;
1816         for ( size_t i = 0 ; i < span ; ++i)
1817         {
1818             regions[i].GetBounds(&bbox,m_context);
1819             widths[startPosition+i] = bbox.Width;
1820         }
1821         remainder -= span;
1822         startPosition += span;
1823     }
1824
1825     delete[] ranges;
1826     delete[] regions;
1827 }
1828
1829 bool wxGDIPlusContext::ShouldOffset() const
1830 {
1831     if ( !m_enableOffset )
1832         return false;
1833
1834     int penwidth = 0 ;
1835     if ( !m_pen.IsNull() )
1836     {
1837         penwidth = (int)((wxGDIPlusPenData*)m_pen.GetRefData())->GetWidth();
1838         if ( penwidth == 0 )
1839             penwidth = 1;
1840     }
1841     return ( penwidth % 2 ) == 1;
1842 }
1843
1844 void* wxGDIPlusContext::GetNativeContext()
1845 {
1846     return m_context;
1847 }
1848
1849 // concatenates this transform with the current transform of this context
1850 void wxGDIPlusContext::ConcatTransform( const wxGraphicsMatrix& matrix )
1851 {
1852     m_context->MultiplyTransform((Matrix*) matrix.GetNativeMatrix());
1853 }
1854
1855 // sets the transform of this context
1856 void wxGDIPlusContext::SetTransform( const wxGraphicsMatrix& matrix )
1857 {
1858     m_context->SetTransform((Matrix*) matrix.GetNativeMatrix());
1859 }
1860
1861 // gets the matrix of this context
1862 wxGraphicsMatrix wxGDIPlusContext::GetTransform() const
1863 {
1864     wxGraphicsMatrix matrix = CreateMatrix();
1865     m_context->GetTransform((Matrix*) matrix.GetNativeMatrix());
1866     return matrix;
1867 }
1868
1869 void wxGDIPlusContext::GetSize( wxDouble* width, wxDouble *height )
1870 {
1871     *width = m_width;
1872     *height = m_height;
1873 }
1874
1875 //-----------------------------------------------------------------------------
1876 // wxGDIPlusPrintingContext implementation
1877 //-----------------------------------------------------------------------------
1878
1879 wxGDIPlusPrintingContext::wxGDIPlusPrintingContext( wxGraphicsRenderer* renderer,
1880                                                     const wxDC& dc )
1881     : wxGDIPlusContext(renderer, dc)
1882 {
1883     Graphics* context = GetGraphics();
1884
1885     //m_context->SetPageUnit(UnitDocument);
1886
1887     // Setup page scale, based on DPI ratio.
1888     // Antecedent should be 100dpi when the default page unit
1889     // (UnitDisplay) is used. Page unit UnitDocument would require 300dpi
1890     // instead. Note that calling SetPageScale() does not have effect on
1891     // non-printing DCs (that is, any other than wxPrinterDC or
1892     // wxEnhMetaFileDC).
1893     REAL dpiRatio = 100.0 / context->GetDpiY();
1894     context->SetPageScale(dpiRatio);
1895
1896     // We use this modifier when measuring fonts. It is needed because the
1897     // page scale is modified above.
1898     m_fontScaleRatio = context->GetDpiY() / 72.0;
1899 }
1900
1901 //-----------------------------------------------------------------------------
1902 // wxGDIPlusRenderer implementation
1903 //-----------------------------------------------------------------------------
1904
1905 IMPLEMENT_DYNAMIC_CLASS(wxGDIPlusRenderer,wxGraphicsRenderer)
1906
1907 static wxGDIPlusRenderer gs_GDIPlusRenderer;
1908
1909 wxGraphicsRenderer* wxGraphicsRenderer::GetDefaultRenderer()
1910 {
1911     return &gs_GDIPlusRenderer;
1912 }
1913
1914 bool wxGDIPlusRenderer::EnsureIsLoaded()
1915 {
1916     // load gdiplus.dll if not yet loaded, but don't bother doing it again
1917     // if we already tried and failed (we don't want to spend lot of time
1918     // returning NULL from wxGraphicsContext::Create(), which may be called
1919     // relatively frequently):
1920     if ( m_loaded == -1 )
1921     {
1922         Load();
1923     }
1924
1925     return m_loaded == 1;
1926 }
1927
1928 // call EnsureIsLoaded() and return returnOnFail value if it fails
1929 #define ENSURE_LOADED_OR_RETURN(returnOnFail)  \
1930     if ( !EnsureIsLoaded() )                   \
1931         return (returnOnFail)
1932
1933
1934 void wxGDIPlusRenderer::Load()
1935 {
1936     GdiplusStartupInput input;
1937     GdiplusStartupOutput output;
1938     if ( GdiplusStartup(&m_gditoken,&input,&output) == Gdiplus::Ok )
1939     {
1940         wxLogTrace("gdiplus", "successfully initialized GDI+");
1941         m_loaded = 1;
1942     }
1943     else
1944     {
1945         wxLogTrace("gdiplus", "failed to initialize GDI+, missing gdiplus.dll?");
1946         m_loaded = 0;
1947     }
1948 }
1949
1950 void wxGDIPlusRenderer::Unload()
1951 {
1952     if ( m_gditoken )
1953     {
1954         GdiplusShutdown(m_gditoken);
1955         m_gditoken = 0;
1956     }
1957     m_loaded = -1; // next Load() will try again
1958 }
1959
1960 wxGraphicsContext * wxGDIPlusRenderer::CreateContext( const wxWindowDC& dc)
1961 {
1962     ENSURE_LOADED_OR_RETURN(NULL);
1963     wxGDIPlusContext* context = new wxGDIPlusContext(this, dc);
1964     context->EnableOffset(true);
1965     return context;
1966 }
1967
1968 #if wxUSE_PRINTING_ARCHITECTURE
1969 wxGraphicsContext * wxGDIPlusRenderer::CreateContext( const wxPrinterDC& dc)
1970 {
1971     ENSURE_LOADED_OR_RETURN(NULL);
1972     wxGDIPlusContext* context = new wxGDIPlusPrintingContext(this, dc);
1973     return context;
1974 }
1975 #endif
1976
1977 #if wxUSE_ENH_METAFILE
1978 wxGraphicsContext * wxGDIPlusRenderer::CreateContext( const wxEnhMetaFileDC& dc)
1979 {
1980     ENSURE_LOADED_OR_RETURN(NULL);
1981     wxGDIPlusContext* context = new wxGDIPlusPrintingContext(this, dc);
1982     return context;
1983 }
1984 #endif
1985
1986 wxGraphicsContext * wxGDIPlusRenderer::CreateContext( const wxMemoryDC& dc)
1987 {
1988     ENSURE_LOADED_OR_RETURN(NULL);
1989     wxGDIPlusContext* context = new wxGDIPlusContext(this, dc);
1990     context->EnableOffset(true);
1991     return context;
1992 }
1993
1994 #if wxUSE_IMAGE
1995 wxGraphicsContext * wxGDIPlusRenderer::CreateContextFromImage(wxImage& image)
1996 {
1997     ENSURE_LOADED_OR_RETURN(NULL);
1998     wxGDIPlusContext* context = new wxGDIPlusImageContext(this, image);
1999     context->EnableOffset(true);
2000     return context;
2001 }
2002
2003 #endif // wxUSE_IMAGE
2004
2005 wxGraphicsContext * wxGDIPlusRenderer::CreateMeasuringContext()
2006 {
2007     ENSURE_LOADED_OR_RETURN(NULL);
2008     return new wxGDIPlusMeasuringContext(this);
2009 }
2010
2011 wxGraphicsContext * wxGDIPlusRenderer::CreateContextFromNativeContext( void * context )
2012 {
2013     ENSURE_LOADED_OR_RETURN(NULL);
2014     return new wxGDIPlusContext(this,(Graphics*) context);
2015 }
2016
2017
2018 wxGraphicsContext * wxGDIPlusRenderer::CreateContextFromNativeWindow( void * window )
2019 {
2020     ENSURE_LOADED_OR_RETURN(NULL);
2021     return new wxGDIPlusContext(this,(HWND) window);
2022 }
2023
2024 wxGraphicsContext * wxGDIPlusRenderer::CreateContext( wxWindow* window )
2025 {
2026     ENSURE_LOADED_OR_RETURN(NULL);
2027     return new wxGDIPlusContext(this, (HWND) window->GetHWND() );
2028 }
2029
2030 // Path
2031
2032 wxGraphicsPath wxGDIPlusRenderer::CreatePath()
2033 {
2034     ENSURE_LOADED_OR_RETURN(wxNullGraphicsPath);
2035     wxGraphicsPath m;
2036     m.SetRefData( new wxGDIPlusPathData(this));
2037     return m;
2038 }
2039
2040
2041 // Matrix
2042
2043 wxGraphicsMatrix wxGDIPlusRenderer::CreateMatrix( wxDouble a, wxDouble b, wxDouble c, wxDouble d,
2044                                                            wxDouble tx, wxDouble ty)
2045
2046 {
2047     ENSURE_LOADED_OR_RETURN(wxNullGraphicsMatrix);
2048     wxGraphicsMatrix m;
2049     wxGDIPlusMatrixData* data = new wxGDIPlusMatrixData( this );
2050     data->Set( a,b,c,d,tx,ty ) ;
2051     m.SetRefData(data);
2052     return m;
2053 }
2054
2055 wxGraphicsPen wxGDIPlusRenderer::CreatePen(const wxPen& pen)
2056 {
2057     ENSURE_LOADED_OR_RETURN(wxNullGraphicsPen);
2058     if ( !pen.IsOk() || pen.GetStyle() == wxTRANSPARENT )
2059         return wxNullGraphicsPen;
2060     else
2061     {
2062         wxGraphicsPen p;
2063         p.SetRefData(new wxGDIPlusPenData( this, pen ));
2064         return p;
2065     }
2066 }
2067
2068 wxGraphicsBrush wxGDIPlusRenderer::CreateBrush(const wxBrush& brush )
2069 {
2070     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBrush);
2071     if ( !brush.IsOk() || brush.GetStyle() == wxTRANSPARENT )
2072         return wxNullGraphicsBrush;
2073     else
2074     {
2075         wxGraphicsBrush p;
2076         p.SetRefData(new wxGDIPlusBrushData( this, brush ));
2077         return p;
2078     }
2079 }
2080
2081 wxGraphicsBrush
2082 wxGDIPlusRenderer::CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
2083                                              wxDouble x2, wxDouble y2,
2084                                              const wxGraphicsGradientStops& stops)
2085 {
2086     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBrush);
2087     wxGraphicsBrush p;
2088     wxGDIPlusBrushData* d = new wxGDIPlusBrushData( this );
2089     d->CreateLinearGradientBrush(x1, y1, x2, y2, stops);
2090     p.SetRefData(d);
2091     return p;
2092  }
2093
2094 wxGraphicsBrush
2095 wxGDIPlusRenderer::CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
2096                                              wxDouble xc, wxDouble yc,
2097                                              wxDouble radius,
2098                                              const wxGraphicsGradientStops& stops)
2099 {
2100     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBrush);
2101     wxGraphicsBrush p;
2102     wxGDIPlusBrushData* d = new wxGDIPlusBrushData( this );
2103     d->CreateRadialGradientBrush(xo,yo,xc,yc,radius,stops);
2104     p.SetRefData(d);
2105     return p;
2106 }
2107
2108 wxGraphicsFont
2109 wxGDIPlusRenderer::CreateFont( const wxFont &font,
2110                                const wxColour &col )
2111 {
2112     ENSURE_LOADED_OR_RETURN(wxNullGraphicsFont);
2113     if ( font.IsOk() )
2114     {
2115         wxGraphicsFont p;
2116         p.SetRefData(new wxGDIPlusFontData( this, font, col ));
2117         return p;
2118     }
2119     else
2120         return wxNullGraphicsFont;
2121 }
2122
2123 wxGraphicsFont
2124 wxGDIPlusRenderer::CreateFont(double size,
2125                               const wxString& facename,
2126                               int flags,
2127                               const wxColour& col)
2128 {
2129     ENSURE_LOADED_OR_RETURN(wxNullGraphicsFont);
2130
2131     // Convert wxFont flags to GDI+ style:
2132     int style = FontStyleRegular;
2133     if ( flags & wxFONTFLAG_ITALIC )
2134         style |= FontStyleItalic;
2135     if ( flags & wxFONTFLAG_UNDERLINED )
2136         style |= FontStyleUnderline;
2137     if ( flags & wxFONTFLAG_BOLD )
2138         style |= FontStyleBold;
2139     if ( flags & wxFONTFLAG_STRIKETHROUGH )
2140         style |= FontStyleStrikeout;
2141
2142
2143     wxGraphicsFont f;
2144     f.SetRefData(new wxGDIPlusFontData(this, facename, size, style, col));
2145     return f;
2146 }
2147
2148 wxGraphicsBitmap wxGDIPlusRenderer::CreateBitmap( const wxBitmap &bitmap )
2149 {
2150     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBitmap);
2151     if ( bitmap.IsOk() )
2152     {
2153         wxGraphicsBitmap p;
2154         p.SetRefData(new wxGDIPlusBitmapData( this , bitmap ));
2155         return p;
2156     }
2157     else
2158         return wxNullGraphicsBitmap;
2159 }
2160
2161 #if wxUSE_IMAGE
2162
2163 wxGraphicsBitmap wxGDIPlusRenderer::CreateBitmapFromImage(const wxImage& image)
2164 {
2165     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBitmap);
2166     if ( image.IsOk() )
2167     {
2168         // Notice that we rely on conversion from wxImage to wxBitmap here but
2169         // we could probably do it more efficiently by converting from wxImage
2170         // to GDI+ Bitmap directly, i.e. copying wxImage pixels to the buffer
2171         // returned by Bitmap::LockBits(). However this would require writing
2172         // code specific for this task while like this we can reuse existing
2173         // code (see also wxGDIPlusBitmapData::ConvertToImage()).
2174         wxGraphicsBitmap gb;
2175         gb.SetRefData(new wxGDIPlusBitmapData(this, image));
2176         return gb;
2177     }
2178     else
2179         return wxNullGraphicsBitmap;
2180 }
2181
2182
2183 wxImage wxGDIPlusRenderer::CreateImageFromBitmap(const wxGraphicsBitmap& bmp)
2184 {
2185     ENSURE_LOADED_OR_RETURN(wxNullImage);
2186     const wxGDIPlusBitmapData* const
2187         data = static_cast<wxGDIPlusBitmapData*>(bmp.GetGraphicsData());
2188
2189     return data ? data->ConvertToImage() : wxNullImage;
2190 }
2191
2192 #endif // wxUSE_IMAGE
2193
2194
2195 wxGraphicsBitmap wxGDIPlusRenderer::CreateBitmapFromNativeBitmap( void *bitmap )
2196 {
2197     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBitmap);
2198     if ( bitmap != NULL )
2199     {
2200         wxGraphicsBitmap p;
2201         p.SetRefData(new wxGDIPlusBitmapData( this , (Bitmap*) bitmap ));
2202         return p;
2203     }
2204     else
2205         return wxNullGraphicsBitmap;
2206 }
2207
2208 wxGraphicsBitmap wxGDIPlusRenderer::CreateSubBitmap( const wxGraphicsBitmap &bitmap, wxDouble x, wxDouble y, wxDouble w, wxDouble h  )
2209 {
2210     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBitmap);
2211     Bitmap* image = static_cast<wxGDIPlusBitmapData*>(bitmap.GetRefData())->GetGDIPlusBitmap();
2212     if ( image )
2213     {
2214         wxGraphicsBitmap p;
2215         p.SetRefData(new wxGDIPlusBitmapData( this , image->Clone( (REAL) x , (REAL) y , (REAL) w , (REAL) h , PixelFormat32bppPARGB) ));
2216         return p;
2217     }
2218     else
2219         return wxNullGraphicsBitmap;
2220 }
2221
2222 // Shutdown GDI+ at app exit, before possible dll unload
2223 class wxGDIPlusRendererModule : public wxModule
2224 {
2225 public:
2226     virtual bool OnInit() { return true; }
2227     virtual void OnExit() { gs_GDIPlusRenderer.Unload(); }
2228
2229 private:
2230     DECLARE_DYNAMIC_CLASS(wxGDIPlusRendererModule)
2231 };
2232
2233 IMPLEMENT_DYNAMIC_CLASS(wxGDIPlusRendererModule, wxModule)
2234
2235 // ----------------------------------------------------------------------------
2236 // wxMSW-specific parts of wxGCDC
2237 // ----------------------------------------------------------------------------
2238
2239 WXHDC wxGCDC::AcquireHDC()
2240 {
2241     wxGraphicsContext * const gc = GetGraphicsContext();
2242     if ( !gc )
2243         return NULL;
2244
2245 #if wxUSE_CAIRO
2246     // we can't get the HDC if it is not a GDI+ context
2247     wxGraphicsRenderer* r1 = gc->GetRenderer();
2248     wxGraphicsRenderer* r2 = wxGraphicsRenderer::GetCairoRenderer();
2249     if (r1 == r2)
2250         return NULL;
2251 #endif
2252
2253     Graphics * const g = static_cast<Graphics *>(gc->GetNativeContext());
2254     return g ? g->GetHDC() : NULL;
2255 }
2256
2257 void wxGCDC::ReleaseHDC(WXHDC hdc)
2258 {
2259     if ( !hdc )
2260         return;
2261
2262     wxGraphicsContext * const gc = GetGraphicsContext();
2263     wxCHECK_RET( gc, "can't release HDC because there is no wxGraphicsContext" );
2264
2265 #if wxUSE_CAIRO
2266     // we can't get the HDC if it is not a GDI+ context
2267     wxGraphicsRenderer* r1 = gc->GetRenderer();
2268     wxGraphicsRenderer* r2 = wxGraphicsRenderer::GetCairoRenderer();
2269     if (r1 == r2)
2270         return;
2271 #endif
2272
2273     Graphics * const g = static_cast<Graphics *>(gc->GetNativeContext());
2274     wxCHECK_RET( g, "can't release HDC because there is no Graphics" );
2275
2276     g->ReleaseHDC((HDC)hdc);
2277 }
2278
2279 #endif  // wxUSE_GRAPHICS_CONTEXT